خلا صلا ـ ة : عون نم يفيكتلا ةانقلا ردقم ءادلأ اًضرع ثحبلا اذه مدقي LMS ةيئاضفلا ةرفشملا تاعومجملا مظن يف نييئاوه مدختست يتلا ةينمزلا لإل اسر ل لابقتسلال اًدحاو اًيئاوهو . و ةانق يه ةمدختسملا ةيكلسلالا ةانقلا Rayleigh ءاضوضلا دوجوب ىسواجلا (Gaussian) يمجتلا جارخلاا يف يع . و حضوت ثحبلا جئاتن إ دحاو لماعم يذ ةانق ردقم مادختساب زاحنم ريغ ريدقت ىلع لوصحلا ةيناكم ) يراسم نم لكل لإا ةراش .( و وحن ةيف...

Major aim of this study is to define the copper and gold anomalies using the combination of the Concentration-Number (C-N) fractal and the stepwise factor analysis, based on stream sediment samples in Lahrud 1:100,000 sheet, NW Iran. The case study is situated in Alborz-Azerbaijan structural zone. Elements related to Au and Cu hydrothermally mineralization were selected for this study, accordin...

The equilibrium geometric structures, relative stabilities, and electronic properties of Au(n)C(-) and Au(n+1)(-) (n = 1-10) clusters are systematically investigated using density functional theory with hyper-generalized gradient approximation. The optimized geometries show that one Au atom capped on Au(n-1)C(-) clusters is a dominant growth pattern for Au(n)C(-) clusters. In contrast to Au(n+1...

The title tetra-nuclear complex, [Au(4)(C(25)H(21)P(2))Cl(3)(C(25)H(22)P(2))]·2C(4)H(8)O, features two non-equivalent Ph(2)PCPPh(2) fragments, one of which represents the 'complete' mol-ecule (with two H atoms at the central C atom); each of the two P atoms of this mol-ecule is coordinated by an Au atom [Au-P = 2.2256 (13) and 2.2710 (13) Å], and these two Au atoms form an Au-Au bond [3.2945 (3...

The title compound, [AuCl(C26H22OP2S)]·0.5CH2Cl2, crystallizes with a trans-O-P⋯P-S geometry of the groups either side of the C=C double bond, which prevents any intra-molecular contact between the Au and O atoms. The Au(I) atom exhibits a nearly linear coordination [Cl-Au-S = 177.55 (4)°]. The mol-ecules associate to form broad ribbons parallel to the c axis via two C-H⋯O, one C-H⋯Cl(Au) and o...

The metal atom in the title ylid-gold(I) adduct, [Au(C(6)F(5))(C(26)H(23)P)]·C(4)H(10)O, exists in a linear coordination environment [C-Au-C = 174.1 (2)°]. The mol-ecule has a short intra-molecular contact involving an aromatic H atom (Au⋯H = 2.64 Å); two adjacent mol-ecules are linked by an Au⋯H(ylid) inter-action (Au⋯H = 3.14 Å).

We introduce the concepts of degree inertia, diG(H), and compression, dcG(H), a finitely generated subgroup H given group G. For case direct products free-abelian free groups, we compute compression give an upper bound for inertia. Imposing some technical assumptions to supremum involved in definition notion called restricted diG′(H), and, again Zm×Fn, provide explicit formula relating it inert...

The Pt@Au catalysts demonstrate remarkably high oxygen reduction reaction (ORR) activity compared with Pt/C catalysts. The ORR of Pt(2)@Au(1)/C and Pt(1)@Au(2)/C is 9.5 and 6.6 times that of Pt/C, respectively. This improvement is attributed to the electronic structure effect of the Au core on the Pt shell and introduction of PFSA.

Exactness of the lowest order supersymmetric WKB (SWKB) quantization condition x 2 x 1 E − ω 2 (x)dx = n¯ hπ, for certain potentials, is examined, using complex integration technique. Comparison of the above scheme with a similar , but exact quantization condition, c p(x, E)dx = 2πn¯ h, originating from the quantum Hamilton-Jacobi formalism reveals that, the locations and the residues of the po...

Three new metal coordination polymers, namely, [Co(DPP)2(H2O)2]·(BS)2·2H2O (1), [Co(DPP)2(H2O)2]·(ABS)2·2H2O (2) and [Co(DPP)2(MBS)2] (3) [DPP = 1,3-di(pyridin-4-yl)propane, BS = phenyl sulfonic acid, ABS = p-aminobenzene sulfonic acid, MBS = p-methylbenzene sulfonic acid] were obtained under hydrothermal conditions. Complexes 1-3 were structurally characterized using X-ray single-crystal diffr...